Disk II: Controller Card Pinouts

The pinouts for the Disk II controller card are:

Pin # Description
----- -----------
1,3,5,7 Gnd
2 Stepper Motor Phase 0
4 Stepper Motor Phase 1
6 Stepper Motor Phase 2
8 Stepper Motor Phase 3
9 -12 volts
10 Write Request
11,12 Vcc (+5 volts)
13,15,17,19 +12 volts
14 Drive Enable (motor on)
16 Read Data
18 Write Data
20 Write Protect